docs: def _get_bandfilenames(self, **options):
          """Get filename for each band"""
          conf = options[self.platform_name + '-viirs']
  
          rootdir = conf['rootdir']
          for section in conf:
              if not section.startswith('section'):
                  continue
              bandnames = conf[section]['bands']
              for band in bandnames:
                  filename = os.path.join(rootdir, conf[section]['filename'])
                  self.bandfilenames[band] = compose(
                      filename, {'bandname': band})